Which characteristics do single celled organisms and multicellular organisms have in common

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.

An infection of the pulp and the surrounding tissue in the mouth is called